As the spring approaches, get off and check them sometime soon. Just had the XS out after about a week in the car park. The roads seemed incredibly slippy, I was at 45 degrees on one junction. Got off, tyres *looked* ok. Stopped for fuel and checked the pressures. 12psi front 9 psi rear. Ooops. It's in for new tyres soon, new tubes as well then I guess.